<html>
<head>
<style>
.ex1 {text-decoration:overline;}
.ex2 {text-decoration:line-through;}
.ex3 {text-decoration:underline;}
.ex4 {text-decoration:blink;}
</style>
</head>

<body>
<div class="ex1">This is a div</div>
<div class="ex2">This is a div</div>
<div class="ex3">This is a div</div>
<div class="ex4">This is a div</div>
</body>

</html>